I leave tv in for the winter. I plug a small oil filed tube heater plunged in all winter to hold moisture down. Open doors under sink and the access panel to the pump, water filter and other plumbing is located. Hold the temp low to mid 40's which works fine. Do close roof vents, and insulate with vent pillows as well.
Marriot2 on Wheels 2017 Flagstaff Classic 832 OKBS
2013 GMC Denali 6.6L 2500 HD DMAX w\Alison Trans
Pepper Pomeranian rescue 101 days as camping buddy
Days camped in FR, 2011 = 20, 2012 = 57, 2013 = 59
... 2014 = 39, 2015 = 52, 2016 = 68, 3 more planned